Sounds like a Brazilian churrascaria, similar to Fogo de Chao. Except Fogo doesn't offer chicken tartar....
Anyway, for those who don't know, at Fogo, you get a chip, one side green, the other side red. If you want meat, you turn up green. And the gauchos come by with meat on a long spit and say, "roast duck," or "lamb,: or "beef tenderloin," or "sausage," whatever he has. If want that item, say, "yes," or point to your plate, and you'll get some. Or say "no," and wait for what you want. If the gaucho sees a red chip, you get left alone.
Expensive, and not for everybody. But a fun place to try different things. Pro-tip: Skip lunch that day...
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